Question

With the increase in temperature the coefficient of linear expansion

Answer 1

If temperature is increased, then the change in temperature also increases. If the change in temperature increases, the coefficient of linear expansion should also increase according to the formula (change in length/length*change in temperature)

Answer-

You want to say that since

α=Δll0ΔT,

then with change in temperature, the constant α should also change.

However, for small changes in temperature, the ratio ΔlΔT remains fairly constant, such that α remains constant